>>35088662after you beat the league, the champ fucks off somewhere to train (like N) and then you catch/defeat arceus, after that, suddenly all kinds of pokemon start migrating from other regions, which have dual types, so the gym leaders and e4 use them
here is the gym rematch, each one shares a pattern
grass/fire/water core (if possible, since there are no fire/fairy or ice/fairy pokemon)
a starter (if possible again, ice and normal have no starters)
an alolan form
a monotyped pokemon, which is their ace on their first fight
and a mega